One of them threw a rock at him, and then they both walked away.

Why on earth would he then throw a rock at it?

"It comes off with a lot of physical force like someone throwing a rock at you."

One night some kid threw a rock at my car.

In the morning they throw rocks at me until I go away.

"We want to be able to do more than just throw rocks at them when they come out!"

Only she kept following, and finally we had to throw rocks.

It did not say why somebody might have thrown a rock through the window.

Some threw rocks, but they were turned back by security forces.

He considered the possibility of someone outside throwing a rock at his window.